Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment (2015)
© 2016. This paper describes the conceptual steps in reaching the design of the AWAKE experiment currently under construction at CERN. We start with an introduction to plasma wakefield acceleration and the motivation for using proton drivers. We then describe the self-modulation instability - a key to an early realization of the concept. This is then followed by the historical development of the experimental design, where the critical issues that arose and their solutions are described. We conclude with the design of the experiment as it is being realized at CERN and some words on the future outlook. A summary of the AWAKE design and construction status as presented in this conference is given in Gschwendtner et al. .
PLASMA PHYSICS AND CONTROLLED FUSION 57 (2015) ARTN 035006
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS 18 (2015) ARTN 081302
Investigation of the solid-liquid phase transition of carbon at 150 GPa with spectrally resolved X-ray scattering
High Energy Density Physics 14 (2015) 38-43
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 453 (2015) 849-867
ASTROPHYSICAL JOURNAL 807 (2015) ARTN 46
Physical review. E, Statistical, nonlinear, and soft matter physics 92 (2015) 053106-
It is shown that the filamentation instability of relativistically intense laser pulses in plasmas can be mitigated in the case where the laser beam has an elliptically distributed beam profile. A high-power elliptical Gaussian laser beam would break up into a regular filamentation pattern-in contrast to the randomly distributed filaments of a circularly distributed laser beam-and much more laser power would be concentrated in the central region. A highly elliptically distributed laser beam experiences anisotropic self-focusing and diffraction processes in the plasma channel ensuring that the unstable diffractive rings of the circular case cannot be produced. The azimuthal modulational instability is thereby suppressed. These findings are verified by three-dimensional particle-in-cell simulations.
Evidence of locally enhanced target heating due to instabilities of counter-streaming fast electron beams
PHYSICS OF PLASMAS 22 (2015) ARTN 020701
Nature communications 6 (2015) 8905-
High-intensity lasers can be used to generate shockwaves, which have found applications in nuclear fusion, proton imaging, cancer therapies and materials science. Collisionless electrostatic shocks are one type of shockwave widely studied for applications involving ion acceleration. Here we show a novel mechanism for collisionless electrostatic shocks to heat small amounts of solid density matter to temperatures of ∼keV in tens of femtoseconds. Unusually, electrons play no direct role in the heating and it is the ions that determine the heating rate. Ions are heated due to an interplay between the electric field of the shock, the local density increase during the passage of the shock and collisions between different species of ion. In simulations, these factors combine to produce rapid, localized heating of the lighter ion species. Although the heated volume is modest, this would be one of the fastest heating mechanisms discovered if demonstrated in the laboratory.
PLASMA PHYSICS AND CONTROLLED FUSION 57 (2015) ARTN 075006
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 447 (2015) 2224-2234
NATURE PHOTONICS 9 (2015) 274-279
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 449 (2015) 3693-3699
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 452 (2015) 2845-2850
EUROPEAN PHYSICAL JOURNAL C 75 (2015) ARTN 20
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 448 (2015) 3391-3404